NEW YORK--While many directors spend years in gestation before making a film, Steven Spielberg seems cheerfully productive. In June he released "Minority Report," an awesomely virtuoso futurist thriller starring Tom Cruise, and now here it is December, and he's back with "Catch Me If You Can," a more lighthearted film starring Leonardo DiCaprio as a teenage impostor and Tom Hanks as the FBI man on his trail. The movie is based on the true story of Frank Abagnale Jr., who now advises corporations against the same kinds of cons he once perfected.